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Brine shrimp usually live in saltwater. Investigate how salt concentration (salinity) affects the rate at which brine shrimp eggs hatch.

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

Is it a square or a circle? See if you can trick your friends with this zany science project!

What is a wedge? Kids find out by experimenting with different wedges in this simple science fair project idea.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

Check out this fun science fair project to make a vinegar and baking soda balloon and demonstrate how gas is created as a result of the chemical reaction.

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

This classic children's game demonstrates how sound travels through air vs. through a solid.

Why does honey crystallize? This science fair project project answers this question and identifies the variable that makes this sweet solute crystallize faster.

Kids will learn about insulation, heat conduction, and the economic benefits of energy efficient windows in this cool science fair project.

Protozoa and ciliate and amoeba, oh my! The objective of this science fair project is for students to use a microscope and identify microscopic life.

Kids will learn how to clean fish tank the natural way. Add catfish to the tank and see if your water gets cleaner.

This is a fantastic and easy science experiment where kids will learn about elasticity by testing how high bouncy balls of different materials can bounce.

Experiment about connection of senses of taste and smell. Using blindfold and noseplugs, administer blind taste test. Analyze results and organize data.

The objective of this science fair project idea is to examine light refraction as it passes through liquid crystals.

This science fair project idea highlights decomposition rates by comparing how long it takes an item to decompose in a compost pile vs. a landfill.

The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.

How powerful is the reaction between baking soda and vinegar? Find out here!

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

Milk is made of water and fat; but how can you separate the two? Find out in this color changing milk experiment.

With this cool floating rocks project, your child will get some hands-on experience with buoyancy and learn why certain rocks like pumice are able to float.

This science fair project idea determines if the color of light affects the growth of plants.

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

What is mulch? Kids will provide soil with a wet blanket of mulch and see if that helps keep drought-stricken soil damp.

This easy and inexpensive paper towel science project introduces kids to important physical concepts like cohesion, adhesion, and capillarity.

What chromosome combinations determine a fetus gender? Use probability to think about whether a sperm and ovum will create a male or female in this project.

In this experiment, students will create their own version of coquina, a sedimentary rock thatâs formed by seashells and sand, cemented by seawater minerals.

This science fair project idea measures the growth of bread dough and finds out how long it takes for the dough to stop rising.

Can you imagine a sky filled with bright, colorful bubbles? Make this whimsical scene come alive with bubble science!